Head rest



FIG. 1 is a side perspective view of the head rest of our claimeddesign;

FIG. 2 is a left side elevational view thereof, the right sideelevational view being a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 rear elevational view thereof; and,

FIG. 6 is a front elevational view thereof.

The ornamental design for a head rest, as shown and described.